1211102001211 has 2 divisors, whose sum is σ = 1211102001212. Its totient is φ = 1211102001210.

The previous prime is 1211102001209. The next prime is 1211102001233. The reversal of 1211102001211 is 1121002011121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211102001211 - 2¹ = 1211102001209 is a prime.

Together with 1211102001209, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1211102001191 and 1211102001200.

It is not a weakly prime, because it can be changed into another prime (1211102001511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605551000605 + 605551000606.

It is an arithmetic number, because the mean of its divisors is an integer number (605551000606).

Almost surely, 2^{1211102001211} is an apocalyptic number.

1211102001211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211102001211 is an equidigital number, since it uses as much as digits as its factorization.

1211102001211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211102001211 its reverse (1121002011121), we get a palindrome (2332104012332).

The spelling of 1211102001211 in words is "one trillion, two hundred eleven billion, one hundred two million, one thousand, two hundred eleven".